function initReq() {
  req=false;
  if(window.XMLHttpRequest)
  {
    req=new XMLHttpRequest;
    if (req.overrideMimeType) {
      req.overrideMimeType('text/html');}
  }
  else if(window.ActiveXObject)
  {
     req=new ActiveXObject("Microsoft.XMLHTTP");
  }

  return req;
}

function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}